In an 11kV line, typically, composite insulators (also known as polymer insulators) or porcelain insulators are used, depending on the region and the environmental conditions.
Materials used for Composite insulator core:The core of the composite insulator is usually made of glass fiber reinforced epoxy resin or glass fiber, which provides high mechanical strength and durability, ensuring that the insulator can withstand tension and environmental pressure, and is more suitable for use in areas with complex environments.
Materials used for Porcelain insulator core:Porcelain, a ceramic material, is the primary material used in porcelain insulators. It is made from a mixture of clay, feldspar, and quartz.
Table of Contents
11KV Insulator Specifications
- Dimensions
Length: The length of 11kV insulators is usually between 400mm and 700mm,
Diameter: The diameter of insulators is mostly between 100mm and 150mm. - Electrical performance
Rated voltage: 11kV (rated voltage), suitable for 11kV power transmission and distribution lines.
Maximum working voltage: Usually 12kV to 14kV, adjusted according to the standards of the power system.
Withstand voltage: Usually the short-term withstand voltage that insulators should be able to withstand is 30kV to 35kV to ensure the safe operation of the line under power shock. - Mechanical strength
Generally, it is required to withstand at least 5kN to 10kN of mechanical tension, depending on the size and material of the insulator design. - Materials and types
Material: Commonly used materials are porcelain (ceramic insulators) or composite materials (polymer insulators). Porcelain insulators are widely used in the power industry due to their excellent electrical properties and weather resistance.
Type: Suspension insulators, disc insulators, rod insulators, etc. - Pollution resistance level
Depending on the environmental conditions in different regions, the pollution resistance level of 11kV insulators can vary. Generally speaking, insulators in lightly polluted areas require lower pollution resistance, while heavily polluted areas require higher pollution resistance. - Other parameters
Working temperature: Generally suitable for a temperature range of -40°C to +70°C, suitable for most climatic conditions.
Waterproof and anti-corrosion: In humid or corrosive environments, some porcelain insulators or composite insulators will adopt waterproof and anti-corrosion designs.
What is the price of 11kV insulator?
On average, the price range for an 11kV insulator is typically between $20 to $100 per unit,depending on the following factors.
Material quality: Higher quality materials and manufacturing processes can increase the price. Using porcelain insulators in certain environmental conditions (such as areas with high pollution) may increase costs, such as additional coatings or increased mechanical strength.
Quantity: Bulk orders usually reduce the unit price.
Brands and suppliers: Well-known brands with a good quality record may charge higher prices.
Shipping and import fees: If you import insulators, shipping costs may increase the total price.
Composite (polymer) insulators are popular because of their lightweight design, pollution resistance, and ability to withstand severe weather conditions. They are covered with a polymer jacket, which is durable and can effectively prevent flashover. Porcelain insulators made of ceramic materials are known for their strength and reliability. However, compared with composite insulators, they are heavier and more prone to breakage.
